造成舵机空舵的原因有哪些?
参考答案:
操舵装置中有空气,致使发送器与受动器不同步;发送器补给油箱的油位太低,使空气进入了操舵装置;充液时没有将空气驱净;操舵系统漏油严重。
In the 21st century, all nations must take their ________of responsibility for the global safety.
A.blame
B.charge
C.notice
D.share